This looks similar to what's posted for 16043. In a nutshell, session variables aren't being stored/updated in v4.1.2.
When posting, it may help the PHP developers to provide info such as webserver config (e.g., IIS using PHP CGI, Apache using php4apache.dll, etc.). For example, in BUG#16043, it seemed everyone was using Apache (mostly the latest version, v1.3.23). Both SAPI module & CGI version seem to be affected.

[2002-03-18 01:49 UTC] martin_jones at bigfoot dot com

FYI: Running Win2K Professional and IIS. PHP running as the php.exe

[2002-03-19 00:39 UTC] webdevguy1 at yahoo dot com

After reading more posts on this subject, I went back and put some debug code into my application. I see now that the POST variables are fine; the difficulty is with the session variables. The problem appears to be somewhere in php4ts.dll, which is copied to \WINNT\system32 as part of the installation. I mentioned earlier that the version from the link in http://www.zend.com/zend/week/week77.php was OK. The link on that page is now dead.
I'm running:
Apache_1.3.23-Mod_SSL_2.8.7-OpenSSL_0.9.6c
Windows 2000 Pro SP2 + pre-SP3 updates
PHP running as module (php4apache.dll); no CGI
MySQL 4.0.1-alpha-win
This problem with session variables is a big deal, but there is no warning on the download page for Windows users.

[2002-03-19 11:21 UTC] zimba at hotmale dot com

Fix it and release a new version or at least make a note on the downloadpage.

Using the $HTTP_SESSION_VARS["foo"] = "bar" is all well and good, but one of the major points about 4.1.x was the new $_SESSION array and its global scope. Infact it got a big mention on the download page. Its only fair to put a big mention that its broke in 4.1.2 as I'm sure that a few devs (myself included) now have broken code using $_SESSION["foo"] = "bar" which is silly to take back to the old way of doing it.
Either make a note or release a patch!
FWIW, this happens on Apache 1.2.23 in SAPI mode and Apache 2.0.32 beta in CGI mode

[2002-03-25 20:14 UTC] anarres at gmx dot net

This comment is just to say that I am experiencing the same problem with PHP 4.1.2 as CGI, Windows 98 SE German, Apache 1.3.20, using php.ini with register_globals turned OFF and neither $_SESSION nor $HTTP_SESSION_VARS is working. A session file is created in the sessions directory but no variables are stored within it. A typical error I get when trying to use a variable previously stored in $_SESSION is:
Warning: Undefined index: text in session_2.php on line 3. I mistakenly reported this as a new bug to http://bugs.php.net/bug.php?id=16273&edit=2 but I set that to "Duplicate" now, so I hope it will be ok. Sorry. Robert

[2002-03-26 22:34 UTC] refrost at dcwi dot com

I recently upgraded to 4.12 running W98: Apache 1.3.19, Win32 PHP/4.1.3-dev running; reg_globals OFF; trying to work my way through sessions. Yikes!! It is hard to figure how it works or when to use $_SESSION or HTTP_SESSION_VARS, w/ or without session_register().
/* this seems to ~work sort of, maybe...
$ship_type = $HTTP_SESSION_VARS['ship_type']; //or with $_SESSION.. which seems to be erratic
session_unregister("ship_type");
$ship_type= 'trs'; //$ship_type + 1;
session_register("ship_type");
flush();
// This allows other pages to show the revised value via $_SESSION["ship_type"]
Now if I could just erase a pair in an array with unset...
Keep up the goodwork!

[2002-03-27 19:05 UTC] peter dot monk at uwi dot com dot au

Hope this isn't too much of a 'me too!'.
I have the same problem on W2K/IIS5 running PHP 4.1.2 as an ISAPI module.
I have looked at the session files in the temp directory and they seem to be created and populated with variables without any trouble. The problem is that any page referencing them returns an 'index not valid' error.
I too am using $_SESSION.
The only way I can get it to work is if I do sessions the "old-fashioned" way, ie:
$foo = 'bar';
session_register( $foo );
If I go back to 4.1.1 everything works fine (using $_SESSION).
Peter.

[2002-04-02 19:42 UTC] andreas at kampanjportalen dot com

OK, so this obviously doesn't work in the 4.1.2 version of PHP...
Does anybody have a link to somewhere I could download the previous 4.1.1 version?? Can't seem to find it...
Thanks!

Nothing changed between 4.1.1 and 4.1.2, but you can try the windows binaries for php 4.2.0rc1 from www.php.net/~derick

[2002-05-04 00:00 UTC] php-bugs at lists dot php dot net

No feedback was provided for this bug for over a month, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".